High-Precision Broadband Impedance Measurements of Three-Phase Common-Mode Chokes Using Single-Port Circuit De-Embedding and Three-Port Network Calibration Methods

Jie, Huamin; Zhao, Zhenyu; Fan, Fei; Zeng, Yu; Sasongko, Firman; Gupta, Amit Kumar; See, Kye Yak

doi:10.1109/tie.2023.3322008

Cited by 11 publications

(1 citation statement)

References 34 publications

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“…Since it is straightforward to use the de-embedding concept for minimizing the parasitic effects in various applications [35][36][37][38], the same theory is employed here. For the de-embedding purpose, figure 6 shows an equivalent circuit of the measurement setup, containing the parasitics of fixture adapters and the motor impedance.…”

Section: De-embedding Fixture Adapters' Parasiticsmentioning

confidence: 99%

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

Jie,

See,

Chang

et al. 2024

Meas. Sci. Technol.

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Three-phase induction motors serve as critical parts in various industrial applications, lauded for their high energy efficiency and notable power density. Obtaining their broadband impedance information is paramount for analyzing conducted emissions, evaluating overvoltage ringing, and assessing motor health status. Nonetheless, conventional methods for motor impedance measurements typically rely on Kelvin clip leads or extension cables, which are effective only in a relatively low-frequency region (i.e., below 1 MHz). This paper presents an improved approach to extend the measurable spectrum from low to high frequencies, up to 120 MHz. The proposed method develops a series of fixture adapters to enable seamless interconnection between the terminals of an induction motor and the coaxial ports of an impedance analyzer. The parasitics introduced by these adapters are identified using boundary-element analysis, and their impacts are minimized based on the de-embedding concept. Experimental results affirm the accuracy and effectiveness of the proposed method for four types of motor impedances (i.e., single-phase, phase-to-ground, common-mode, and differential-mode) across a broad frequency range from 100 Hz to 120 MHz. Moreover, the inaccuracy of motor impedance measurements at high frequencies (i.e., above 1 MHz) using conventional methods, including Kelvin clip leads and extension cables, is also demonstrated.

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Section: De-embedding Fixture Adapters' Parasiticsmentioning

confidence: 99%

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

Jie,

See,

Chang

et al. 2024

Meas. Sci. Technol.

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Far field radiated emissions prediction of a flyback adapter with curved cables utilizing electromagnetic simulation method

He,

Wang,

Wang

et al. 2024

IET Power Electronics

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Radiated emissions (RE) testing has long been a challenge in the development of a switched mode power supply (SMPS) with respect to electromagnetic compatibility performance. Accurate far‐field RE prediction can effectively help SMPS designers reveal and understand the mechanisms of radiation generation, and reasonably suppress it. In this paper, a model for predicting the radiation from a single excitation source and a parasitic radiator for a flyback adapter are proposed after analysing the common mode voltage and current paths. Then, novel methods are proposed to predict the far‐field RE of the flyback adapter based on measurements and electromagnetic simulations. Using these methods, the 10‐m far‐field radiation of the flyback adapter under the curved cables layout is accurately predicted and verified by experiments. Then, the characteristics and influencing factors of the radiation are analysed, including the far‐field patterns, the load volume, and the sag degree of the output cable. Finally, a suppression design of the capacitor‐inductor (CL) notch filter is designed for the frequency points that are above the standard limits, and the RE are reduced to less than 30 dBµV/m from 30 to 300 MHz. The research methods proposed in this paper have good reference significance for radiation analysis and prediction of power electronic devices.

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A review of intentional electromagnetic interference in power electronics: Conducted and radiated susceptibility

Jie,

Zhao,

Zeng

et al. 2024

IET Power Electronics

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With the advancements in Industry 4.0 and the global demand for sustainable energy, power electronics devices are emerging as pivotal components for modern industrial, transportation, and energy delivery. Ensuring the security of these devices is of paramount importance for safeguarding the reliable operation of critical systems against any threats. In recent years, the issue of intentional electromagnetic interference (IEMI) attack and their related countermeasures have gained widespread attention in both military and civilian power electronics sectors. Here, a review of IEMI in power electronics is provided. Starting from the electromagnetic compatibility standards, the test setups for evaluating the device immunity are introduced. Due to different attack modes and propagation paths, IEMI illuminations are typically categorized into conduction and radiation, where their susceptibility studies, applications, and defence strategies are discussed, respectively. Finally, the existing challenges, ongoing trends, and future topics in this field are discussed.

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High-Precision Broadband Impedance Measurements of Three-Phase Common-Mode Chokes Using Single-Port Circuit De-Embedding and Three-Port Network Calibration Methods

Cited by 11 publications

References 34 publications

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

Far field radiated emissions prediction of a flyback adapter with curved cables utilizing electromagnetic simulation method

A review of intentional electromagnetic interference in power electronics: Conducted and radiated susceptibility

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